16649329 has 8 divisors (see below), whose sum is σ = 17096960. Its totient is φ = 16207776.

The previous prime is 16649323. The next prime is 16649333. The reversal of 16649329 is 92394661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16649329 - 2¹³ = 16641137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16649291 and 16649300.

It is not an unprimeable number, because it can be changed into a prime (16649323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324 + ... + 7210.

It is an arithmetic number, because the mean of its divisors is an integer number (2137120).

Almost surely, 2^16649329 is an apocalyptic number.

It is an amenable number.

16649329 is a deficient number, since it is larger than the sum of its proper divisors (447631).

16649329 is an equidigital number, since it uses as much as digits as its factorization.

16649329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039.

The product of its digits is 69984, while the sum is 40.

The square root of 16649329 is about 4080.3589302903. The cubic root of 16649329 is about 255.3478732836.

The spelling of 16649329 in words is "sixteen million, six hundred forty-nine thousand, three hundred twenty-nine".